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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 32, Iss. 6 — Mar. 15, 2014
  • pp: 1068–1074

Detailed Characterization of Optical Fibers by Combining $\bm S^{\bf 2}$ Imaging With Correlation Filter Mode Analysis

Clémence Jollivet, Daniel Flamm, Michael Duparré, and Axel Schülzgen

Journal of Lightwave Technology, Vol. 32, Issue 6, pp. 1068-1074 (2014)

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Spatially and spectrally resolved imaging $(S^{2}$ imaging) and correlation filter technique (CFT) are two very different, widespread fiber mode analysis techniques. Both techniques have been successfully employed to decompose few-modes and multimode beams respectively. In this study, we present a novel experimental tool combining $S^{2}$ imaging and CFT mode analyses in a unique system. We demonstrate that both methods are complementary with the ability to fully resolve scalar and vector-valued transverse modal fields. Using results from the combined experiment, mode powers ( ${\rho}^{2})$ evaluated from CFT analysis and $S^{2}$ imaging are directly compared for a wide range of fiber beams (from single- to multi-mode). As a result, we experimentally identify the mode detection limit of each mode analysis and prove that $S^{2}$ imaging accuracy range can be considerably increased employing an analytical mode evaluation method. The conclusion contains a table summarizing the expertise of each mode analysis.

© 2013 IEEE

Clémence Jollivet, Daniel Flamm, Michael Duparré, and Axel Schülzgen, "Detailed Characterization of Optical Fibers by Combining $\bm S^{\bf 2}$ Imaging With Correlation Filter Mode Analysis," J. Lightwave Technol. 32, 1068-1074 (2014)

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